I am entered in an oldest furnace contest. I have a hallmark model HGL 95 serial 19741. My house was built in 1960 and I believe this to be the original furnace. Hallmark has no record of this furnace. Please help me. I do not think it is 1974.
I haven’t seen them up here.
It looks like Boyertown bought Hallmark:
http://hvac-talk.com/vbb/showthread.php?t=103890
You could contact them:
http://www.boyertownfurnace.com/ProductDocuments/HallmarkLiterature.pdf
http://www.boyertownfurnace.com/ContactUs/Contact.aspx
Penny;
Contact John Bowman at Building Intelligence here…
http://hisearch.web.officelive.com/contact.aspx
He has a lot of contacts in the HVAC market…